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May 2003 - December 2017
Publications
Publications (149)
Regional-level applications of dynamic vegetation models are challenging because they need to accommodate the variation in plant functional diversity, which requires moving away from broadly-defined functional types. Different approaches have been adopted in the last years to incorporate a trait-based perspective into modeling exercises. A common p...
The Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) provides a framework for the collation of a set of consistent, multi-sector, multi-scale climate-impact simulations, based on scientifically and politically relevant historical and future scenarios. This framework serves as a basis for robust projections of climate impacts, as well as...
Forest models are instrumental for understanding and projecting the impact of climate change on forests. A considerable number of forest models have been developed in the last decades. However, few systematic and comprehensive model comparisons have been performed in Europe that combine an evaluation of modelled carbon and water fluxes and forest s...
1. Resilience of endangered rear edge populations of cold‐adapted forests in the Mediterranean basin is increasingly altered by extreme heatwave and drought pressures. It remains unknown, however, whether microclimatic variation in these isolated forests could ultimately result in large intra‐population variability in the demographic responses, all...
Plant transpiration links physiological responses of
vegetation to water supply and demand with hydrological, energy, and carbon
budgets at the land–atmosphere interface. However, despite being the main
land evaporative flux at the global scale, transpiration and its response to
environmental drivers are currently not well constrained by observatio...
Rising atmospheric [CO2] (Ca) generally enhances tree growth if nutrients are not limiting. However, reduced water availability and elevated evaporative demand may offset such fertilization. Trees with access to deep soil water may be able to mitigate such stresses and respond more positively to Ca. Here, we sought to evaluate how increased vapor p...
Plant transpiration links physiological responses of vegetation to water supply and demand with hydrological,energy and carbon budgets at the land-atmosphere interface. However, despite being the main land evaporative flux at the global scale, transpiration and its response to environmental drivers are currently not well constrained by observations...
Faecal pollution modelling is a valuable tool to evaluate and improve water management strategies, especially in a context of water scarcity. The reduction dynamics of five faecal indicator organisms (E. coli, spores of sulphite- reducing clostridia, somatic coliphages, GA17 bacteriophages and a human-specific Bifidobacterium molecular marker) were...
Robinia pseudoacacia L. occupies large areas of Mediterranean riparian zones of the northeast of the Iberian Peninsula. This study investigates the influence of the invasive alien nitrogen-fixing R. pseudoacacia on leaf litter nitrogen (N) inputs and soil N availability in a mixed riparian forest in NE Spain. We measured annual leaf litter N inputs...
Plant trait variability, emerging from eco-evolutionary dynamics that range from alleles to macroecological scales, is one of the most elusive, but possibly most consequential, aspects of biodiversity. Plasticity, epigenetics, and genetic diversity are major determinants of how plants will respond to climate change, yet these processes are rarely r...
Global warming is raising concerns about the acclimatory capacity of trees and forests, especially in Mediterranean-type ecosystems. The sensitivity of photosynthesis to temperature is a key uncertainty for projecting the magnitude of terrestrial feedbacks on future climate change. While boreal, temperate and tropical species have been comparativel...
Mediterranean riparian forests are comparably humid environments that provide shelter for several broadleaved deciduous tree species at their southernmost distribution margin. The stability of these communities, however, is threatened by climate change as well as invasive tree species, such as black locust (Robinia pseudoacacia L.). So far, black l...
Models are pivotal for assessing future forest dynamics under the impacts of changing climate and management practices, incorporating representations of tree growth, mortality, and regeneration. Quantitative studies on the importance of mortality submodels are scarce. We evaluated 15 dynamic vegetation models (DVMs) regarding their sensitivity to d...
This paper describes the assumptions, equations and procedures of the RheaG Weather Generator Algorithm (WGA). RheaG was conceived for the generation of robust daily meteorological time-series whether in static or transient climate conditions. Here we analyze its performance in four Iberian locations -i.e. Bilbao, Barcelona, Madrid, Sevilla-, with...
Vegetation plays a key role in riparian area functioning by controlling water and nitrate (N‐NO3‐) transfers to streams. We investigated how spatial heterogeneity modifies the influence of vegetation transpiration on soil water and N‐NO3‐ balances in the vadose soil of a Mediterranean riparian forest. Based on field data, we simulated water flow an...
A moderate increase in temperature is going to favor the performance of black locust in SE Mediterranean riparian forests. A severe climate change may imply that both autochthonous and allochthonous tree species would worsen their performances.
Riparian zones play a fundamental role in regulating the amount of
carbon (C) and nitrogen (N) that is exported from
catchments. However, C and N removal via soil gaseous pathways can
influence local budgets of greenhouse gas (GHG) emissions and
contribute to climate change. Over a year, we quantified soil
effluxes of carbon dioxide (CO2) and nitro...
Most of Spanish forests are currently growing under water deficit conditions. Climate change projections indicate an increase of water deficit stress upon Aleppo pine (Pinus halepensis Mill.) forests. Thus, soil water holding capacity and its availability for trees are important traits to consider when modeling forest responses to climate change, a...
Los itinerarios de gestión forestal ORGEST son un conjunto de actuaciones silvícolas preestablecidas desarrollados en Catalunya para la gestión de distintas masas forestales con distintos objetivos de gestión. Los criterios de actuación en los modelos ORGEST se establecen en relación a unas condiciones ambientales que en el actual contexto de cambi...
La falsa acacia (Robinia pseudoacacia L.) es una especie invasora originaria de los montes Apalaches. Se introdujo en Europa durante el siglo XVIII y desde entonces, se ha expandido a lo largo de las regiones húmedas del continente Europeo, incluyendo hábitats de especial interés ecológico protegidos en el marco de la red Natura 2000. Su gran capac...
Climate change is increasing temperatures globally and drought in many regions. If climate change continues at its current rate, the resilience of many ecosystems will likely be exceeded, altering their structure and function. A consistent understanding of the impacts, however, remains elusive due to the difficulty of obtaining data of field studie...
Mediterranean riparian zones act as vegetation shelters for several deciduous tree species at the edge of their bioclimatic distribution, e.g. alder (Alnus glutinosa), black poplar (Populus nigra) or ash (Fraxinus excelsior). Current global warming and human induced disturbances may worsen their growing conditions. Under such circumstances, black l...
Modeling and monitoring
the processes involved in terrestrial carbon sequestration are often thought to be independent events. In fact, rigorously validated modern modeling techniques are very useful tools in the monitoring
of the carbon sequestration potential of an ecosystem through simulation
, by highlighting key areas for study of what is a co...
Riparian zones play a fundamental role in regulating the amount of carbon (C) and nitrogen (N) that is exported from catchments. However, C and N removal via soil gaseous pathways can influence local budgets of greenhouse gases (GHG) emissions and contribute to climate change. Over a year, we quantified soil effluxes of carbon dioxide (CO2) and nit...
Recent studies projecting future climate change impacts on forests mainly consider either the effects of climate change on productivity or on disturbances. However, productivity and disturbances are intrinsically linked because 1) disturbances directly affect forest productivity (e.g. via a reduction in leaf area, growing stock or resource-use effi...
Humans affect streams by changing land uses in the catchment, altering stream channel morphology, and delivering nutrients, emergent pollutants and pathogens from urban and industrial activities into the streams. These activities clearly threaten the ecosystem health, but also can constitute a human health risk, since streams and rivers are a key w...
Resumen En la riera de Cànoves, al pie del Parque Natural y Reserva de la Biosfera del Montseny, se está llevando a cabo un proyecto piloto para analizar la influencia de los cambios morfo-hidráulicos en el cauce del río, asociados a distintas técnicas de restauración fluvial, sobre la capacidad de autodepuración de nutrientes de estos ecosistemas....
Drought has been shown to reduce soil respiration (SR) in previous studies. Meanwhile, studies of the effect of forest management on SR yielded contrasting results. However, little is known about the combined effect of drought and forest management on SR. To investigate if the drought stress on SR can be mitigated by thinning, we implemented plots...
In the last decades, the global interest in the role of forests as carbon sinks has grown, and thus, studies aimed at estimating tree biomass have progressively increased. However, few surveys have focused on young coppices, although they are abundant worldwide in areas regenerating after disturbance (e.g. wildfire, clearcutting). In the Mediterran...
Terrestrial carbon exchange is a key process of the global carbon cycle consisting of a delicate balance between photosynthetic carbon uptake and respiratory release. We have, however, a limited understanding how long-term decreases in precipitation induced by climate change affect the boundaries and mechanisms of photosynthesis and respiration. We...
Drought limits tree water use and growth of Mediterranean trees. However, growth and water use strategies are rarely addressed simultaneously across species and drought conditions. Here, we investigate the link between stem diameter variations and sap flow in four co-existing Mediterranean trees (Pinus halepensis Mill., Quercus pubescens Willd., Qu...
The Mediterranean region is a hot spot of climate change vulnerable to increased droughts and heat waves. Scaling carbon fluxes from leaf to landscape levels is particularly challenging under drought conditions. We aimed to improve the mechanistic understanding of the seasonal acclimation of photosynthesis and morphology in sunlit and shaded leaves...
Studies of climate change impacts on agricultural land use generally consider sets of climates combined with fixed socio-economic scenarios, making it impossible to compare the impact of specific factors within these scenario sets. Analysis of the impact of specific scenario factors is extremely difficult due to prohibitively long run-times of the...
Integrated cross-sectoral impact assessments facilitate a comprehensive understanding of interdependencies and potential synergies, conflicts, and trade-offs between sectors under changing conditions. This paper presents a sensitivity analysis of a European integrated assessment model, the CLIMSAVE integrated assessment platform (IAP). The IAP inco...
Soil respiration (SR) is a major component of ecosystem’s carbon cycle and represents
the second largest CO2 flux of the terrestrial biosphere. Soil temperature is considered
to be the primary control on SR whereas soil moisture as the secondary control factor.
However, 5 soil moisture can become the dominant control on SR in very wet or dry
condit...
Soil respiration (SR) is a major component of ecosystems' carbon cycles and
represents the second largest CO2 flux in the
terrestrial biosphere. Soil temperature is considered to be the
primary abiotic control on SR, whereas soil moisture is the secondary control
factor. However, soil moisture can become the dominant control on SR
in very wet or dr...
Evergreen trees in the Mediterranean region must cope with a wide range of environmental stresses from summer drought to winter cold. The mildness of Mediterranean winters can periodically lead to favourable environmental conditions above the threshold for a positive carbon balance, benefitting evergreen woody species more than deciduous ones. The...
Evergreen trees in the Mediterranean region must cope with a wide range of
environmental stresses from summer drought to winter cold. The mildness of
Mediterranean winters can periodically lead to favourable environmental
conditions above the threshold for a positive carbon balance, benefitting
evergreen woody species more than deciduous ones. The...
Predicting the large-scale consequences of drought in contrasting environments requires that we understand how drought effects
differ among species originating from those environments. A previous meta-analysis of published experiments suggested that
the effects of drought on both stomatal and non-stomatal limitations to photosynthesis may vary cons...
Estudiar el cambio global de origen antropogénico en los ecosistemas mundiales, y sus efectos sobre los mismos, es y será uno de los principales retos de la ecología del siglo XXI. Los ecosistemas forestales españoles ya se encuentran actualmente limitados por el estrés hídrico. Esta limitación se verá agravada por los efectos del cambio climático...
Un rasgo característico de los ecosistemas
forestales mediterráneos es la presencia de un período
con un mayor o menor grado de estrés hídrico (Vicente�Serrano 2006, Sabaté & Gracia 2010, García-Ruíz et
al. 2011) durante el verano. Es decir, en la disyuntiva
existente entre una transpiración limitada por el agua
disponible o limitada por la de...
Drought-induced decline is affecting Pinus sylvestris populations in southern Europe, with very little impact on the more drought-tolerant Quercus pubescens. Although multiple studies have investigated interspecific differences in water use and growth strategies, the link between these two processes and how they vary within drought-exposed populati...
File S1 Supporting information file including Text S1, Tables S1–S4, and Figure S1. Text S1. Description of the sampling methods. Table S1. Basic data of the 15 sampled plots and abundances of animal species: burnt logging (L1 to L5), burnt subsoiling (S1 to S5) and unburnt (U1 to U5); Data: species included (Y) and excluded (N) in statistical anal...
Fire is a major agent involved in landscape transformation and an indirect cause of changes in species composition. Responses to fire may vary greatly depending on life histories and functional traits of species. We have examined the taxonomic and functional responses to fire of eight taxonomic animal groups displaying a gradient of dietary and mob...
• Se proyecta un incremento de la producción forestal durante la primera mitad de este siglo debido al efecto fertilizador del aumento de la concentración de CO2 atmosférico.
• En la segunda mitad de este siglo y para los escenarios climáticos más adversos, se proyecta una disminución de la producción forestal. El aumento de la aridez durante dich...
SOSTENIBILIDAD EN ESPAÑA 2011 327 l Observatorio de la Sostenibilidad de España (OSE) ha preparado el presente capítulo espe-cial sobre bosques, en el marco de su Informe Sostenibilidad en España 2011, con ocasión de la celebración del Año Internacional de los Bosques. La Asamblea General de Naciones Unidas acordó en 2006 celebrar en 2011 este impo...
AimOur aim was to map the climate dependence of tree species distributions (probability of occurrence) and forest growth (net primary productivity) by comparing the congruence and incongruence between correlative and process-based modelling approaches. LocationIberian Peninsula, south-western Europe. Methods
We used forest inventory data for three...
Drought stress is known to limit tree patterns of water use and radial growth in Mediterranean-type ecosystems. However, both processes are rarely dealt with in combination in multi-species studies. Here, we combine sap flow measurements with automatic band dendrometers in order to assess year-round water use strategies and stem radius growth of fo...
Different responses to water availability and evaporative demand of four co-occurring riparian tree species in NE Iberian Peninsula: Temporal and spatial sap flow patterns
Mediterranean riparian forests are natural refuges for boreal and temperate origin's tree species as black alder (Alnus glutinosa L. Gaertn.), black poplar (Populus nigra L.), and ash tree (Fraxinus excelsior L.). These riparian tree species are vulnerable when exposed to water scarcity. Under climate change scenarios drier and hotter environments...
Drought stress is known to limit tree patterns of water use and radial growth in Mediterranean-type ecosystems. However, both processes are rarely dealt with in combination in multi-species studies. Here, we combine sap flow measurements with automatic band dendrometers in order to assess year-round water use strategies and stem radius growth of fo...
Soil respiration is a major component in ecosystem carbon cycle and is
strongly affected by soil water content. Soil respiration consists of
autotrophic and heterotrophic respiration, which may have different
sensitivities toward soil water content. The objectives of this study
are: (1) to analyze the seasonal variation in soil water table and soil...
The aim of this work was to provide a matrix of photosynthetic
parameters and leaf traits of four co-occurring tree species (Populus
nigra, Alnus glutinosa, Robinia pseudoacacia, Fraxinus excelsior) in
spring and summer and to improve our ecophysiological understanding of
species differences concerning distribution and habitat-specific
competitive...
Evergreen tree species in the Mediterranean region have to cope with a
wide range of environmental stress conditions from summer drought to
winter cold. The winter period can lead to photoinhibition due to a
combination of high solar irradiances and chilling temperatures which
can reduce the light saturation point. However, Mediterranean winter
mil...
Severe droughts may increase physiological stress on long-lived woody vegetation, occasionally leading to rapid defoliation and progressive increase in mortality of overstorey trees. Over the last few years, episodes of drought-induced tree dieback have been documented in a variety of woodlands and forests around the world. However, the factors det...
Seasonal and daily pattern of carbon assimilation dynamics by twigs of Q. cerroides and Q. ilex: Effect of rainfall reduction and selective thinning